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Mass to line-strength relations from IUE spectra of early-type stars
An extensive survey of the 1200-1900 A region in OB type stellar spectraobtained from the IUE archives has been used to establish line-strengthversus spectral-type relationships. One hundred and sixty-threelow-resolution IUE spectra of 124 well-classified O3 to B5 stars wereexamined. Earlier results that the equivalent width of Si IV (1400 A)and C IV (1550 A) features are well correlated with optical spectraltype are confirmed. The equivalent width/spectral type/luminosity classrelations for these features are then established.
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Observation and Astrometry data
| Constellation: | Pégase |
| Right ascension: | 22h08m45.79s |
| Declination: | +34°30'15.8" |
| Apparent magnitude: | 8.709 |
| Distance: | 274.725 parsecs |
| Proper motion RA: | -7.7 |
| Proper motion Dec: | -7.8 |
| B-T magnitude: | 10.104 |
| V-T magnitude: | 8.825 |
Catalogs and designations:
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